Telegraph system



Feb. 20, 1934. w, BURCKY r AL 1,947,694,

TELEGRAPH SYSTEM Filed Oct. 20, 1932 MToR Patented Feb. 20, 1934 PATENT ome a NUNITED STATES I O Ciaiml. ((31. 178-4) l9 closed in U. 8. Patent 1,745,833 to B. Morton et al., or 1,796,378 to H. L. Krum.

In printing telegraph machines of the class having a receiving apparatus and a transmitting apparatus the current commercial practice has been to establish inter-communication stations and centralized circuits over which each station may alternatively transmit to or receive from other stations similarly equipped. In or der to facilitate this practice each station is It provided with a ringer circuit over which it may be signalled to receive the attention of the operator thereof, a receiving circuit over which the incoming signals are recorded, and. a transmitting circuit over which out-going signals are transmitted. In addition to these, there is provided also local operating circuits containing the operating motor and its associatedinstrumentalities. v t g I The methods of operation and communica- 89 tion employed with the types of machines enumerated above are more fully described in the patents referred to and do not in themselves form a part of the present invention except insofar as certain means are included in the pres- 86 out invention for conveniently and unerringly controlling the various circuits thereof as will be more fully described hereinafter.

The salient object of the present invention is to provide a simplified unitary structure or 40 master control meansto control the various circuits of a telegraph communication system rapidly and in proper sequence to simplify the establishment of communication between two stations. Y

In addition to the features already set forth,

' another phase of the present invention includes the control ofa supplemental electromagnet by the master control switch which electromagnet functions to mechanically maintain the selector magnet armature instop or-markim position duringvthe non-operative condition of the station when it would otherwise tend to assume referred to hereinafter as the anti-spin magnet.

The anti-spin magnet is located near the selector lever or selector armature extension of the receiving apparatus and its armature acts upon the selector lever to hold it in step or so marking position during the non-energization of the anti-spin magnet or. in other words, during such time that its circuit is open.

The object of the present invention are attained by the use of a master control means 35' which comprises a parallelly movable rack shaped to straddle a toggle switch lever that controls a motor operating circuit so that in its movement the rack throws the toggle switch and tends to remain in place under the influ- 7o ence of the latter's characteristic action. The rack carries a pair of projecting arms each of insulated material, one of which controls the anti-spin circuit and the other of which alternatively connects -with the incoming line either the ringer or call apparatus or the receiving mechanism. r The present invention consists of the features disclosed in the following specification set forth in the hereunto appended claims and illustrated 60 in the accompany drawing, in which:

Fig, 1 is a front elevation illustrating the switch structure as applied to a printing telegraphmachine such as is more fully disclosed and described in copending application of Morgs ton et al. Serial No. 467,352, filed July 11, 1930,

Patent No. 1,904,184, granted April 18, 1938.

Fig. 2 is a side elevation illustrating the'same subject matter as is shown in Fig. '1. I

Fig. 8 is a fragmentary plan view of a selector no mechanism such as that illustrated in copending application referred to and also illustrated in Hb%v2oftheH.L.Krumpatent-referredtti a c.

Fig. 4 is a detail sectional viewtakenap-cs proximately on lines 4-4 of Pig. ,3.

Fig. 5 is a simplified circuit diagram illustrating the application of the premnt invention to a system such as is disclosed in thccoponding application. 10o

Referring now more particularly to the accompanying drawing in which like reference characters indicate similar parts throughout. the numeral 11 indicates generally an upstanding closure in which is located a motor switch 108 12, Figs. 1, 2 and 5. A sheet metal member 18 is supported on the front surface of the upstanding portion 11 by means of two screws 14 which are adapted to fit loosely within elongated slots 15 thereof. The lower-most portion of member 110 13 is bent over perpendicularly with respect to the main portion so as to afford a finger piece 16, while an intermediate portion thereof is formed with a U-shaped arch 17 which straddles within its parallel sides a spherical knob 18 of a toggle switch handle 19, Fig. 2.

On its right side member 13 .carries an extending arm 21 having at its extremity a roller 22 perpendicularly disposed thereto while at its lower left side member 13 carries a similar arm 23 having a roller 24.

On the left side of upstanding member 11 there are supported a pair of contact springs 25 and 26 normally out of engagement as illustrated in Fig. 1, while on the right side and oppositely disposed in a perpendicular sense are a set of three contact springs 27, 28 and 29, the intermediate one (28) of which is normally urged to engage its right hand associate spring 29 by roller 22 while tending of its own spring bias to engage its left hand associate spring 2'7. During this condition roller 24 remains away from contact 25 allowing the latter to remain out of engagement with its associate contact spring 26 while at the same time toggle switch arm 19 is maintained in its down or oil position.

When bringing a station into communication an operator engages finger piece 16 and moves member 13 upwardly until it assumes the position illustrated in broken lines in Figs. 1 and 2. At this time contacts 25 and 26 are brought into engagement by roller 24, toggle switch arm 19 is shifted to its on position and contact spring 28 is permitted to break its engagement with right hand contact 29 and make engagement with its left hand contact 27. The sequence with which these several connections are made and broken during the movement of memoer 13 in both directions is very significant and will be brought out more particularly in connection with the description of operation hereinafter.

The selector mechanism illustrated in Fig. 3. is similar to that which is commercially used in several standard types 01' printing telegraph machines. As illustrated in the instant case, its function is that of a setting means for a series of code elements which are not shown but are exemplified by the fragment 31 and are capable oi being moved into one or another of two positions. To each element 31 is articulated a reciprocable lever 32 which has two symmetrical and opposite extensions 33 and one engagement arm 34 and is pivoted with other of its kind upon common pivot shaft 35. A sword-shaped floating bar 36 is associated with each lever 32 and is carried through disc and socket engagement 37 by a follower lever 38 pivoted at 39 and urged clockwise by a spring 41.

Each follower lever 38 has integrally formed therewith a projection 42 which is normally disposed to engage the periphery of an associated cam 43 carried upon a cam assembly sleeve 44. Upon rotating clockwise sleeve 44 through its several cams 43 which are located in a spiral progression thereon engages the several projections 42 of levers 38 and in cooperation with in dividual springs 41 effects a reciprocating motion to each of them successively. The movement thus received by levers 38 is also imparted to sword-shaped-fbars 36 so that as viewed in Fig. 3 these members are likewise successively reciprocated in a left to right motion during each selective cycle of operation.

A selector magnet comprising a pair of windings 45 is disposed to act upon a bell crank armature 46 pivoted at 4'7 and normally maintained in its clockwise extremity by a spring 48. At its remote end armature 46 is T-shaped and has depending portions 49 terminating the extremity of its cross bar 51. The distance between depending portions 49 of lever 46 is somewhat less than the distance between each cooperating pair of lugs 52 forming part of the hilt of the sword-shaped levers 36 so that when either of the portions 49 is disposed to register opposite its cooperating lugs 52 the other of the two portions 49 falls short of engagement with its lugs 52. In its extremities of movement lever 46 may be maintained so that one or another of its portions 49 registers opposite its corresponding lugs 52. As may be seen from Fig. 3 spring 48 tends to maintain lever 46 so that one of its portions 49 registers opposite its associated lug 52 while magnet 45 upon energization operates to maintain it so that the other of its depending portions 49 registers opposite its associated lug 52. Again, the energization of windings 45 causes the presentment of lever 46 in one position while its deenergization results in its presentment in the other position.

Windings 45 may be directly controlled by incoming line signals but is preferably energized by a local source of current under the direction of a line relay 53 which operates a contactor 54 as indicated in Fig. 5.

A magnet 55 supported by bracket 56 coopcrates with an armature 5'1 the remote end of which is notched at 58, Fig. 4, and is located so as to receive within its notch 58 a narrowed portion 59 of selector lever 46. Magnet 55 is connected in parallel with selector magnet 45 and is accordingly energized from the same source therewith, viz., the direct current output of a rectifier 60. Each magnet 45 and 55, however, has its own energization control switch 54 and 25 respectively, so that when the selector relay 53 receives a marking impulse which corresponds to a current conditionin accordance with the prevailing practice, magnet 45 is energized by the movement of its armature 54 which closes its circuit while the closure of contacts 25 and 26, which condition prevails during the upward presentment of master control 13, establishes the circuit 66 which energizes relay 55.

Thus, it well be seen that anti-spin magnet 55 is energized at all times that the station is in communicative condition and the control rack 13 is up, while it is deenergized at other times; and because armature 5'7 is effective only during the deenergized condition of its magnet 55 and is inefiective during the energized condition thereof, it will restrain selector lever 46 in marking position except when the receiving mechanism is in communicative condition.

General operation movement of switch 13 is the disengagement between roller 22 and contact spring 28 where upon the latter is permitted to break connection with its right hand contact 29 and establish connection with its left hand contact 27. This change, see Fig. 5, results in the short circuiting of the local alarm circuit 61 and a cutting in, in its stead, of local signalling circuit 65, after which the operating motor M is started by the throwing of switch lever 19, which closes switch 12, and lastly roller 24 rides into engagement with contact spring 25 closing the circuit 66 and energizing anti-spin magnet 55.

Since the magnet 55 is parallelly connected across the direct current terminals of the rectifier 60 andv is subjected solely to the control of contacts 25 and 26, the magnet 55 will be energized to restrain its armature 5'? at all times in which the station is in condition for communication. In so restraining armature 5'7, selector lever 46 is free from mechanical restraint and subject only to the influence of its magnet 45. When selector lever 48 is either mechanically or electrically held in marking or stop position, cam assembly 44 as well as the rest of the selector mechanism will remain at rest, otherwise, that is, during a spacing condition and in the absence of restraining action on the part of ,lever 57, spring 48 would urge lever 46 into spacing position which corresponds to the normal start position and thereby initiate the rotation of assembly 44 and its associated selected mechanism. A prolonged spacing condition causes the selector mechanism to run indefinitely and thereby to record falsely as in the case of a code combination comprised entirely of spacing signals. This is prevented however by the aforedescribed intervention of the anti-spin mechanism.

Thus it will be understood. that the succession of operation of the various switches is infallibly maintained, however slowly or rapidly the master switch 13 is operated and that as a result of this coordination the function of preparing a called station in response to a calling signal is vastly simplified so that the reaction by a called operator to a calling signal may be reflexive rather than contemplative.- Similarly upon disconnecting, a station operator need only move master switch member 13 downwardly to effect the proper disconnect operations which occur in the following sequence. Roller 24 withdraws from engagement with contact 25 opening the anti-spin magnet circuit and immediately causing armature 57 to lock selector lever 46 instep position. Thereafter switch 19 is moved downwardly opening the mainmO- tor circuit and finally towards the end of its movement roller 22 again engages contactor 28 reestablishing the ringer circuit 61 in connection with the main line and disengaging the signallin circuit .65 therefrom.

The present invention is capable of numerous modifications and variations not specifically illustrated in the'accompanying drawing nor described in the foregoing specification. I It is therefore intended not to be limited to the particular disclosure hereinbefore set forth but to be permitted to include such modifications and variations as may be construed in accordance with the hereunto appended'claims.

Whatis claimed is: a

1. In a telegraph communication system, a receiving station including a call responsive mechanism, a communication signal responsive mechanism, a local operating mechanism, a false signal preventive means, electrical connection between each of said mechanisms and means,

a channel of communication, and a master con-; trol switch operable in one direction to exclude in said connections said call mechanism and preventive means and include said signal mechanism and operating means and operative in another direction conversely.

2. In a receiving telegraph printer, a single responsive selective mechanism, an arresting means operable to suspend the effectiveness of said mechanism, and a mastencontrol switch operative to condition said arresting means for operation while the operation of said mechanism is suspended and to suspend said means while said mechanism is effective.

3. In a telegraphic device, a selecting mechanism including an electro-signal responsive element, a set of selecting members, a plurality of performing members, an operating motorfor i said mechanism, means for arresting the movemerit of said element in the event of certain predetermined conditions, and a single action switch for controlling the eiIectiveness of said mechanism, motor and arresting means.

4. In a telegraph system, a switch mechanism including a manually reciprocable main member, a toggle action switch articulated to said member and adapted to impart its tendencies of motion thereto, a set of contacts capable of two electrical conditions, and a projection from said member acting upon said contacts to maintain them in one or the other of their conditions in accordance with the condition of said toggle switch. p

5. In a telegraph system, means for coordinating several successively operable electrical switches so as tov be controllable by a single manual operation including a main member movable into two positions, a toggle mechanism for retaining said member in each of its positions, a plurality of sets of contact pieces located near said main member, and a projecting portion from said member for each of said sets engaging it and controlling it thereby.

6. In combination, a telegraph printing machine including a selecting mechanism, an armature controlled by electrical signals for setting said selecting mechanism, a motor for operating said selecting mechanism, a blocking mem ber active upon said armature to confine it in a single action switch operative in one position to energize said mechanism and motor and with draw said blocking member and in the other position conversely.

.7. In a transmission system, a circuit over which are transmitted alarm signals and communication signals, a printing machine including a selector mechanism, an armature responsive to said communication signals for controlling said mechanism, a motor for operating said machine, an alarm device, a first switch for controlling the energization of said motor, a second switch for connecting said machine to said circuit, a third switch for connecting said 15::

position to arrest said selecting mechanism, and

device to said circuit, a lever for retaining said armature in stop position during open condition of said second switch, and a single action control member for coordinating the operation of said switches and said lever.

8. In a telegraph communication system, a receiving station including a call responsive apparatus and a communication signalresponsive apparatus, a signalling line, and means operative to connect either of said apparatuses with said line comprising a stationary supporting structure, a line contactor, a call apparatus contact, a signal apparatus contact, and a parallelly movable member having-mechanical connection with said contactor and supported upon said structure for movement in one direction for communication of said contactor with said call apparatus contact and in another direction for communication thereof with said signal apparatus contact.

9. A telegraph communication system including a receiving station having a call signal responsive device, a communication signal responsive mechanism, local circuits individual to said device and mechanism,'a transmission line and means for alternatively connecting each of said circuits to said line comprising a rack member supported for limited linear movement, a contactor carried by said member operative during one position of said member to connect said line with saiddevice, and another contactor 0perative during another position thereof to connect said line with said mechanism.

CHARLES W. BURCKY. ALBERT H. REIBER.

CERTIFICATE OF CORRECTION.

Patent No. 1, 947, 694.

CHARLES W.

February 20, 1934.

BURCKY, ET AL.

It is hereby certified that error appears in the printed apecification of the above numbered patent requiring correction as follows: Page 1, line 64, for "object" read objects; page 2, line 129, for "well" read will; page 3, line 93, claim 2, for "single" read signal; and that the said Lettera Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of May, A; D. 1934.

(Seal) Bryan M. Battey 

